Analyze an SDS

DOT Division 5.1: Oxidizers

Division 5.1 is the DOT division for oxidizers: materials that may, generally by yielding oxygen, cause or enhance the combustion of other materials. They are not usually flammable themselves, but they make fires much more intense and can ignite combustible materials.

How it is defined

  • Packing group is based on how strongly the oxidizer accelerates burning in standard tests.
  • Contamination with combustible material is the main danger in storage and handling.
  • Some oxidizers are also corrosive or toxic and carry subsidiary labels.

Summary of 49 CFR Parts 171 to 180. The regulations and the Hazardous Materials Table (49 CFR 172.101) control any shipment.

Label and placard

Colors
Yellow background, black flame over a circle
Symbol
Flame over a circle

A yellow diamond with a flame over a circle and the number 5.1.

Packing groups

PG I (high), PG II (medium), PG III (low), reflecting how much the substance accelerates burning. How packing groups work.

Common examples

  • Ammonium nitrate (fertilizer grade)
  • Calcium hypochlorite (pool chemical)
  • Potassium permanganate
  • Sodium chlorate
  • Hydrogen peroxide solutions above certain strengths

How it relates to GHS

Corresponds to GHS oxidizing liquids, solids and gases, shown with the flame over circle pictogram (GHS03).

DOT classes and GHS classes are assigned under different rules, so a product can have different severity labels in each. See also all GHS hazard classes.

Safe handling reminders

  • Store away from fuels, oils, solvents, wood and paper.
  • Use clean, dedicated tools and containers.
  • Keep dry unless the SDS says otherwise.

Where to find it on an SDS

Section 14 shows Division 5.1, UN number, packing group and ERG guide number. Look in Section 14: Transport information. Hazard classification for the workplace is in Section 2. You can also see how a UN number points to a response guide on the UN and NA numbers page.

Frequently asked questions

What is a Division 5.1 material?

A Division 5.1 material is a DOT oxidizer: it can cause or enhance the combustion of other materials, usually by releasing oxygen. Ammonium nitrate and calcium hypochlorite are examples.

General reference only. It does not replace the supplier's SDS or the current federal regulations.